21180520

素因数分解:

$2^3\times 5^1\times {\mathrm{529513}}^1$

素因数の和:529524

約数の個数: 16

約数和(自身を含む): 47656260

約数和(自身を除く): 26475740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 529513, 1059026, 2118052, 2647565, 4236104, 5295130, 10590260, 21180520]

約数ペア:

[(1, 21180520), (2, 10590260), (4, 5295130), (5, 4236104), (8, 2647565), (10, 2118052), (20, 1059026), (40, 529513)]